Question: When the temperature of an extrinsic semiconductor is increased, the pronounced effect is on_________________?

• 1. Junction capacitance
• 2. Minority carriers
• 3. Majority carriers
• 4. None of the above

Question: The leakage current in a pn junction is of the order of________________?

• 1. Aa
• 2. mA
• 3. kA
• 4. µA

Question: The leakage current across a pn junction is due to________________?

• 1. Minority carriers
• 2. Majority carriers
• 3. Junction capacitance
• 4. None of the above

Question: With forward bias to a pn junction , the width of depletion layer__________________?

• 1. Decreases
• 2. Increases
• 3. Remains the same
• 4. None of the above

Question: At room temperature, an intrinsic semiconductor has_______________?

• 1. Many holes only
• 2. A few free electrons and holes
• 3. Many free electrons only
• 4. No holes or free electrons

Question: At room temperature, an intrinsic silicon crystal acts approximately as_______________?

• 1. A battery
• 2. A conductor
• 3. An insulator
• 4. A piece of copper wire

Question: A forward biased pn junction diode has a resistance of the order of_____________?

• 1. O
• 2. kO
• 3. MO
• 4. None of the above

Question: In a semiconductor, current conduction is due to________________?

• 1. Only holes
• 2. Only free electrons
• 3. Holes and free electrons
• 4. None of the above

Question: The impurity level in an extrinsic semiconductor is about_______________of pure semiconductor ?

• 1. 10 atoms for 108 atoms
• 2. 1 atom for 108 atoms
• 3. 1 atom for 104 atoms
• 4. 1 atom for 100 atoms

Question: The resistivity of pure germanium under standard conditions is about_______________?

• 1. 6 x 104 cm
• 2. 60 x cm
• 3. 3 x 106 cm
• 4. 6 x 10-4 cm